diff --git a/Tests/CurlHttpClientTest.php b/Tests/CurlHttpClientTest.php
index ec43a83..3ff0c9a 100644
--- a/Tests/CurlHttpClientTest.php
+++ b/Tests/CurlHttpClientTest.php
@@ -121,7 +121,7 @@ public function testOverridingInternalAttributesUsingCurlOptions()
         $httpClient->request('POST', 'http://localhost:8057/', [
             'extra' => [
                 'curl' => [
-                    \CURLOPT_PRIVATE => 'overriden private',
+                    \CURLOPT_PRIVATE => 'overridden private',
                 ],
             ],
         ]);
diff --git a/Tests/HttplugClientTest.php b/Tests/HttplugClientTest.php
index 0e62425..41ed55e 100644
--- a/Tests/HttplugClientTest.php
+++ b/Tests/HttplugClientTest.php
@@ -37,6 +37,9 @@ public static function tearDownAfterClass(): void
         TestHttpServer::stop();
     }
 
+    /**
+     * @requires function ob_gzhandler
+     */
     public function testSendRequest()
     {
         $client = new HttplugClient(new NativeHttpClient());
@@ -51,6 +54,9 @@ public function testSendRequest()
         $this->assertSame('HTTP/1.1', $body['SERVER_PROTOCOL']);
     }
 
+    /**
+     * @requires function ob_gzhandler
+     */
     public function testSendAsyncRequest()
     {
         $client = new HttplugClient(new NativeHttpClient());
diff --git a/Tests/Psr18ClientTest.php b/Tests/Psr18ClientTest.php
index d1f4deb..65b7f5b 100644
--- a/Tests/Psr18ClientTest.php
+++ b/Tests/Psr18ClientTest.php
@@ -33,6 +33,9 @@ public static function tearDownAfterClass(): void
         TestHttpServer::stop();
     }
 
+    /**
+     * @requires function ob_gzhandler
+     */
     public function testSendRequest()
     {
         $factory = new Psr17Factory();